Inhibition of preS1-hepatocyte interaction by an array of recombinant human antibodies from naturally recovered individuals

Sankhyan, Anurag ; Sharma, Chandresh ; Dutta, Durgashree ; Sharma, Tarang ; Chosdol, Kunzang ; Wakita, Takaji ; Watashi, Koichi ; Awasthi, Amit ; Acharya, Subrat K. ; Khanna, Navin ; Tiwari, Ashutosh ; Sinha, Subrata (2016) Inhibition of preS1-hepatocyte interaction by an array of recombinant human antibodies from naturally recovered individuals Scientific Reports, 6 (1). ISSN 2045-2322

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Official URL: http://doi.org/10.1038/srep21240

Related URL: http://dx.doi.org/10.1038/srep21240

Abstract

Neutralizing monoclonal antibodies are being found to be increasingly useful in viral infections. In hepatitis B infection, antibodies are proven to be useful for passive prophylaxis. The preS1 region (21–47a.a.) of HBV contains the viral hepatocyte-binding domain crucial for its attachment and infection of hepatocytes. Antibodies against this region are neutralizing and are best suited for immune-based neutralization of HBV, especially in view of their not recognizing decoy particles. Anti-preS1 (21–47a.a.) antibodies are present in serum of spontaneously recovered individuals. We generated a phage-displayed scFv library using circulating lymphocytes from these individuals and selected four preS1-peptide specific scFvs with markedly distinct sequences from this library. All the antibodies recognized the blood-derived and recombinant preS1 containing antigens. Each scFv showed a discrete binding signature, interacting with different amino acids within the preS1-peptide region. Ability to prevent binding of the preS1 protein (N-terminus 60a.a.) to HepG2 cells stably expressing hNTCP (HepG2-hNTCP-C4 cells), the HBV receptor on human hepatocytes was taken as a surrogate marker for neutralizing capacity. These antibodies inhibited preS1-hepatocyte interaction individually and even better in combination. Such a combination of potentially neutralizing recombinant antibodies with defined specificities could be used for preventing/managing HBV infections, including those by possible escape mutants.

Item Type:Article
Source:Copyright of this article belongs to Springer Nature Limited
ID Code:128883
Deposited On:22 Nov 2022 09:24
Last Modified:22 Nov 2022 09:24

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